| St Catherine's Catholic Primary School, Littlehampton151256 | Primary | Good | 18.9% | 212 |
| St Augustine's CofE Primary School126009 | Primary | Good | 14.6% | 96 |
| St Anthony's School126155 | Not applicable | Outstanding | 41.3% | 240 |
| St Andrew's CofE Primary School126030 | Primary | Good | 5.5% | 165 |
| St Andrew's CofE Primary School126047 | Primary | Good | 15.5% | 207 |
| St Andrew's CofE High School126094 | Secondary | Good | 24.7% | 739 |
| Springfield Infant School and Nursery125967 | Primary | Outstanding | 16.1% | 168 |
| Springboard Education135180 | Not applicable | — | — | 26 |
| Southway Primary School138413 | Primary | Good | 28.5% | 495 |
| Southway Junior School125941 | Primary | Good | 16.0% | 362 |
| Southwater Junior Academy136865 | Primary | Good | 9.0% | 445 |
| Southwater Infant Academy136866 | Primary | Good | 4.9% | 268 |
| Southgate Primary144599 | Primary | Good | 35.7% | 280 |
| Southbourne Junior School125878 | Primary | Good | 18.2% | 225 |
| Southbourne Infant School125875 | Primary | Good | 17.6% | 176 |
| South Bersted CofE Primary School125973 | Primary | Good | 15.0% | 200 |
| Sompting Village Primary School134896 | Primary | Good | 25.0% | 388 |
| Sompting Abbotts School126121 | Not applicable | — | — | 106 |
| Slinfold CofE Primary School and Pre School125995 | Primary | Good | 16.5% | 127 |
| Slindon College126119 | Not applicable | — | — | 112 |
| Slindon CofE Primary School125994 | Primary | Good | 23.7% | 76 |
| Singleton CofE Primary School125993 | Primary | Good | 15.7% | 70 |
| Sidlesham Primary School125853 | Primary | Requires Improvement | 20.6% | 136 |
| Shoreham College126112 | Not applicable | — | — | 352 |
| Shoreham Beach Primary School125885 | Primary | Good | 11.1% | 198 |
| Shoreham Academy135962 | Secondary | Outstanding | 16.2% | 1,777 |
| Shipley CofE Primary School125992 | Primary | Good | 8.1% | 74 |
| Shelley Primary School125820 | Primary | Requires Improvement | 12.7% | 411 |
| Sheddingdean Community Primary School125958 | Primary | Requires Improvement | 13.5% | 208 |
| Seymour Primary School138645 | Primary | Good | 30.3% | 457 |
| Serenity School Crawley149160 | Not applicable | — | — | 154 |
| Seaside Primary School143387 | Primary | Outstanding | 10.5% | 620 |
| Seal Primary Academy138071 | Primary | Good | 20.2% | 302 |
| Seaford College126110 | Not applicable | — | — | 962 |
| Seadown School135691 | Not applicable | — | — | 29 |
| Sackville School126089 | Secondary | Good | 13.3% | 1,599 |
| Rustington Community Primary School139478 | Primary | Good | 7.9% | 579 |
| Rusper Primary School150703 | Primary | Inadequate | — | — |
| Rumboldswhyke CofE Primary School148184 | Primary | Good | 26.4% | 125 |
| Rudgwick Primary School125849 | Primary | Good | 5.1% | 215 |
| Rose Green Junior School141600 | Primary | Outstanding | 12.6% | 356 |
| Rose Green Infant School125928 | Primary | Good | 10.2% | 254 |
| Rogate CofE Primary School125991 | Primary | Good | 9.7% | 62 |
| River Beach Primary School140089 | Primary | Good | 27.0% | 677 |
| Rikkyo School-in-England126132 | Not applicable | — | — | 190 |
| Red Balloon Worthing Learner Centre149217 | Not applicable | — | — | 20 |
| Rake CofE Primary School125989 | Primary | Good | 11.4% | 88 |
| Queen Elizabeth Ii Silver Jubilee School, Horsham126160 | Not applicable | Outstanding | 25.9% | 137 |
| Pound Hill Junior School, Crawley125905 | Primary | Good | 14.8% | 358 |
| Pound Hill Infant Academy142290 | Primary | Good | 7.4% | 269 |